glutton

/ˈɡlʌtən/
noun
  1. A person who eats or drinks too much, often greedily.
    • The story warns against becoming a glutton who never feels full.
    • At the buffet, the glutton piled his plate high with food.
    • She called him a glutton because he ate three desserts in one sitting.
  2. A person who has a great capacity for something, especially something difficult or unpleasant.
    • He is a glutton for punishment and always takes on the hardest tasks.
    • She's a glutton for work and never takes a day off.
    • My brother is a glutton for adventure and loves extreme sports.